The Falcon 9 is slated to take off in the wee hours of Tuesday morning, sometime during a two-hour window that begins at 12:33AM ET.
The rocket will carry a spaceship for Hispasat, a 25-year-old operating company for different Spanish communications satellites.
The rocket was also able to reach a preliminary parking orbit within eight minutes and 40 seconds of the launch.
Since its first flight, the Falcon 9 has grown more than 50 feet and gained some 600,000 lbs.
"It [is] the largest geostationary satellite we've ever flown", Musk twittered.
The company expects to try to land the rocket on its "Of Course I Still Love You" droneship in the Atlantic Ocean.
A SpaceX Falcon 9 rocket is seen over Los Angeles, California after launching from Vandenberg Air Force Base, February 22, 2018. It will hover above the planet's surface and provide "television, broadband, corporate networks and other telecommunications solutions", SpaceX said in a press kit for the mission. A similar launch was successful when SpaceX had sent 4,800 pounds of payload into the orbit towards the worldwide space station. Deploying a payload to geostationary orbit requires much more fuel than low-Earth orbit, and the Hispasat 30W-6 weighs in at more than 6,000 kilograms (13,227 pounds).
The Range managed by the Air Force's 45th Space Wing now enters a lull until early April, when SpaceX could return with another launch of International Space Station supplies.